构造煤结构-成因新分类及其地质意义

The new structure-genetic classification system in tectonically deformed coals and its geological significance

在详细研究沁水盆地和两淮煤田构造煤的基础上,结合前人的研究成果,扩展了构造煤的概念,提出了一套既适合于煤层气勘探开发又适合于煤与瓦斯突出防治的构造煤结构-成因分类方案.此分类方案是以构造煤的手标本或钻井煤芯为尺度,按构造变形机制分为脆性变形、脆韧性变形和韧性变形3个变形序列的10类煤.

Based on the site measured data and many results of test in the laboratory, and combined existing classification, the new structure-genetic classification system of tectonically deformed coals was put forward which was suitable for both development of coalbed gas and prevention and harness of coal and gas outbursts. The hand specimens or the core coal samples for drilling wells were taken as the scale, tectonically deformed coals formed by different deformational mechanisms were divided into three series of deformation and ten classes: the series of brittle deformation includes cataclastic structure coal, mortar structure coal, granulitic structure coal and mealy structure coal,and schistose structure coal, thin section structure coal; the series of ductile deformation includes wrinkle structure coal, mylonitic structure coal and ductile structure coal; the series of brittle-ductile includes scale structure coal.